9) How do you know a chemical change has occurred? a. New bonds have formed or bonds have broken. b. The matter has had a change in state. c. The temperature has changed. d. All of the above e. Only a and c are indicators of a chemical change. please help!!!!! 15 pts 10) If a chemical bond is formed or destroyed, what changes? a. Energy is absorbed or released. b. Protons are absorbed. c. Neutrons will vary. d. Energy is destroyed. e. Protons are released.

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